BW

Hi A friend has just purchased a 1998 King Charles II pack with 3 coaces. Beautiful mint condition (including the box) even with the original shipping package. Including the certificate of authentication, 0549 of 1500. It is King Charles II 6009 on one side but on the other it is King Charles I with the same number. The label has not been altered so it looks like a manufactiring issue. Has anyone come across this before and will it make a difference to the value? Thanks